The CCA-SDM Point-to-Point integration has a builtin checksum checker which works by when sending a CI that has never been been sent before, CCA saves a checksum value in the database. This is done in order to save process\bandwidth if you attempt to resend the same server with no changes being done

If changes to a server were made and then attempted to send, then the checksum value would have changed and the CI would be exported\updated in TWA